From towering skylines and massive dams to modern bridges and centuries-old temples, concrete structures are the basis for much of civilization’s infrastructure and its physical development. Concrete is used worldwide, more than any other manufactured product—twice as much of it is used throughout the world than all other building materials combined. Each year, approximately four tonnes are used for every one of the nearly seven billion people on Earth. (This information comes from the 2009 U.S. Geological Survey).